Protesters and troops fought in Cairo on Sunday, the third day of clashes that have killed 10 people and exposed rifts over the army’s role as it manages Egypt’s promised transition from military to civilian rule.

Troops have set up barriers on streets around Tahrir Square, the hub of the uprising that ousted President Hosni Mubarak and now again convulsed by violence as protesters demand that the generals who took charge in February quit power.

Soldiers in riot gear were filmed on Saturday beating protesters with long sticks even after they had fallen to the ground. A Reuters picture showed two soldiers dragging a woman lying on the ground by her shirt, exposing her underwear.

The violence has overshadowed a staggered parliamentary election, the first free vote most Egyptians can remember, that is set to give Islamists the biggest bloc.